<template>
    <div class='header'>
        <!-- 折叠按钮 -->
        <div class='collapse-btn' @click='collapseChage'>
            <i v-if='!collapse' class='el-icon-s-fold'></i>
            <i v-else class='el-icon-s-unfold'></i>
        </div>
        <div class='logo'>ZRK电影院会员管理系统</div>
        <div class='header-right'>
            <div class='header-user-con'>
                <!-- 全屏显示 -->
                <div class='btn-fullscreen' @click='handleFullScreen'>
                    <el-tooltip effect='dark' :content='fullscreen?`取消全屏`:`全屏`' placement='bottom'>
                        <i class='el-icon-rank'></i>
                    </el-tooltip>
                </div>
                <!-- 用户头像 -->
                <div class='user-avator'>
                    <img src='../../assets/img/admin.png' />
                </div>
                <!-- 用户名下拉菜单 -->
                <el-dropdown class='user-name' trigger='click' @command='handleCommand'>
                    <span class='el-dropdown-link'>
                        {{ id }}
                        <i class='el-icon-caret-bottom'></i>
                    </span>
                    <el-dropdown-menu slot='dropdown'>
                        <el-dropdown-item divided command='loginout'>退出登录</el-dropdown-item>
                    </el-dropdown-menu>
                </el-dropdown>
            </div>
        </div>
    </div>
</template>
<script>
    import bus from '../common/bus';

    export default {
        data() {
            return {
                collapse: false,
                fullscreen: false,
                defaultManagerId: 'admin'
            };
        },
        computed: {
            id() {
                let id = localStorage.getItem('managerId');
                return id ? id : this.defaultManagerId;
            }
        },
        methods: {
            // 用户名下拉菜单选择事件
            handleCommand(command) {
                if (command == 'loginout') {
                    localStorage.removeItem('ms_username');
                    this.$router.push('/login');
                }
            },
            // 侧边栏折叠
            collapseChage() {
                this.collapse = !this.collapse;
                bus.$emit('collapse', this.collapse);
            },
            // 全屏事件
            handleFullScreen() {
                let element = document.documentElement;
                if (this.fullscreen) {
                    if (document.exitFullscreen) {
                        document.exitFullscreen();
                    } else if (document.webkitCancelFullScreen) {
                        document.webkitCancelFullScreen();
                    } else if (document.mozCancelFullScreen) {
                        document.mozCancelFullScreen();
                    } else if (document.msExitFullscreen) {
                        document.msExitFullscreen();
                    }
                } else {
                    if (element.requestFullscreen) {
                        element.requestFullscreen();
                    } else if (element.webkitRequestFullScreen) {
                        element.webkitRequestFullScreen();
                    } else if (element.mozRequestFullScreen) {
                        element.mozRequestFullScreen();
                    } else if (element.msRequestFullscreen) {
                        // IE11
                        element.msRequestFullscreen();
                    }
                }
                this.fullscreen = !this.fullscreen;
            }
        },
        mounted() {
            if (document.body.clientWidth < 1500) {
                this.collapseChage();
            }
        }
    };
</script>
<style scoped>
    .header {
        position: relative;
        box-sizing: border-box;
        width: 100%;
        height: 70px;
        font-size: 22px;
        color: #fff;
    }

    .collapse-btn {
        float: left;
        padding: 0 21px;
        cursor: pointer;
        line-height: 70px;
    }

    .header .logo {
        float: left;
        width: 250px;
        line-height: 70px;
    }

    .header-right {
        float: right;
        padding-right: 50px;
    }

    .header-user-con {
        display: flex;
        height: 70px;
        align-items: center;
    }

    .btn-fullscreen {
        transform: rotate(45deg);
        margin-right: 5px;
        font-size: 24px;
    }

    .btn-bell,
    .btn-fullscreen {
        position: relative;
        width: 30px;
        height: 30px;
        text-align: center;
        border-radius: 15px;
        cursor: pointer;
    }

    .btn-bell-badge {
        position: absolute;
        right: 0;
        top: -2px;
        width: 8px;
        height: 8px;
        border-radius: 4px;
        background: #f56c6c;
        color: #fff;
    }

    .btn-bell .el-icon-bell {
        color: #fff;
    }

    .user-name {
        margin-left: 10px;
    }

    .user-avator {
        margin-left: 20px;
    }

    .user-avator img {
        display: block;
        width: 40px;
        height: 40px;
        border-radius: 50%;
    }

    .el-dropdown-link {
        color: #fff;
        cursor: pointer;
    }

    .el-dropdown-menu__item {
        text-align: center;
    }
</style>
